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Preparation method for synthesizing brominated polycarbonate

A technology of brominated polycarbonate and double catalyst is applied in the preparation of flame retardant brominated polycarbonate and the preparation of double catalyst to synthesize brominated polycarbonate, which can solve the problems of low catalytic efficiency of a single catalyst and achieve control The effect of production cost, high efficiency and simple process

Active Publication Date: 2008-05-14
山东旭锐新材股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcoming of low catalytic efficiency of a single catalyst, and provide a preparation method for synthesizing brominated polycarbonate with a double catalyst, by using a double catalyst system and capping with a monohydric phenol reagent, at normal temperature and normal pressure. Brominated polycarbonate with an average molecular weight of 2500-2800 has the characteristics of good thermal stability, high yield, controllable molecular weight, and low content of impurities such as chlorine

Method used

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  • Preparation method for synthesizing brominated polycarbonate
  • Preparation method for synthesizing brominated polycarbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) catalyzer triethylamine 0.84ml (0.006mol) is dissolved in 40ml dichloroethane, standby;

[0037] (2) Add 100g (0.184mol) of tetrabromobisphenol A, 150ml of water, 15g (0.375mol) of sodium hydroxide, 140ml of dichloroethane, 22.9g (0.077mol) of triphosgene into the reaction vessel, stir for 35min, and dissolve. Keep at 20-25°C;

[0038] (3) Add the solution prepared in step (1) dropwise to the reaction system, 5.44ml (0.009mol) of dibutyltin dilaurate, and stir for 60min;

[0039] (4) Dissolve 8g (0.2mol) of sodium hydroxide and 8.64g (0.092mol) of phenol in 142ml of water, slowly add the dissolved mixed solution into the reaction system, and stir and react at 30-35°C for 150min;

[0040] (5) Wash with 50 ml of 1% sodium hydroxide, let stand to separate layers, and separate the organic layer;

[0041] (6) wash with 50ml of 1% hydrochloric acid, leave to stand for stratification, and separate the organic layer;

[0042] (7) Wash with 150ml of deionized water three ...

Embodiment 2

[0047] (1) Dissolve 0.84ml (0.006mol) of catalyst triethylamine in 40ml of dichloroethane for later use; (2) add 100g (0.184mol) of tetrabromobisphenol A, 150ml of water, and 15.2g of sodium hydroxide into the reaction vessel (0.38mol), dichloroethane 140ml, triphosgene 24.04g (0.081mol), stir for 35min, dissolve, keep at 20-25°C;

[0048] (3) Add the solution prepared in step (1) dropwise to the reaction system, 5.44ml (0.009mol) of dibutyltin dilaurate, and stir for 60min;

[0049] (4) Dissolve 8.8g (0.22mol) of sodium hydroxide and 9.504g (0.101mol) of phenol in 142ml of water, slowly add the dissolved mixture dropwise into the reaction system, and stir and react at 30-35°C for 150min;

[0050] (5) Wash with 50 ml of 1% sodium hydroxide, let stand to separate layers, and separate the organic layer;

[0051] (6) Wash with 50ml of 1% hydrochloric acid, leave to stand for stratification, and separate the organic phase;

[0052] (7) Wash with 150ml of deionized water for thre...

Embodiment 3

[0057] (1) catalyzer triethylamine 0.84ml (0.006mol) is dissolved in 40ml dichloroethane, standby;

[0058] (2) Add 100g (0.184mol) of tetrabromobisphenol A, 150ml of water, 14.72g (0.368mol) of sodium hydroxide, 140ml of dichloroethane, 22.4g (0.075mol) of triphosgene into the reaction vessel, stir for 35min, dissolve , keep at 20-25°C;

[0059] (3) Add the solution prepared in step (1) dropwise to the reaction system, 5.44ml (0.009mol) of dibutyltin dilaurate, and stir for 60min;

[0060] (4) Dissolve 7.0g (0.175mol) of sodium hydroxide and 7.52g (0.08mol) of phenol in 142ml of water, slowly add the dissolved mixture dropwise into the reaction system, and stir and react at 30-35°C for 150min;

[0061] (5) Wash with 50 ml of 1% sodium hydroxide, let stand to separate layers, and separate the organic layer;

[0062] (6) Wash with 50ml of 1% hydrochloric acid, leave to stand for stratification, and separate the organic phase;

[0063] (7) Wash with 150ml of deionized water f...

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Abstract

The invention provides a preparation method for synthesizing brominated polycarbonate with dual catalysts. By using a dual catalyst system and capping with a monohydric phenol reagent, brominated polycarbonate with an average molecular weight of 2500-2800 can be obtained at normal temperature and normal pressure , has the characteristics of good thermal stability, high yield, controllable molecular weight, and low content of impurities such as chlorine.

Description

technical field [0001] The invention relates to a preparation method of flame retardant brominated polycarbonate, in particular to a preparation method of synthesizing brominated polycarbonate with double catalysts, and belongs to the field of fine chemical industry. Background technique [0002] Polycarbonate is one of the five general-purpose engineering plastics. It has good transparency, good resistance to ultraviolet radiation, and high impact strength. In recent years, it has been widely used in mechanical parts, electronics, electrical instruments, optics, food and medical equipment parts. In engineering plastics, its consumption is second only to polyamide, and its prospect is very bright. The flame retardant of polycarbonate has always been a research hotspot. Although many flame retardants, such as ammonium polyphosphate and triphenyl phosphate, can play a good flame retardant effect, the above products have peculiar smell and poor migration resistance during proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/28
Inventor 杨树仁郝建港王新玲王志强张荣华刘旺之袁红焕杨象民程文学
Owner 山东旭锐新材股份有限公司
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